VERITAS Volume Manager 3.5 Administrator's Guide (September 2002)

Removing a DRL Log

198 VERITAS Volume Manager Administrator’s Guide

For a volume that will be written to sequentially, such as a database log volume, include

the logtype=drlseq attribute to specify that sequential DRL is to be used:

# vxassist addlog volume logtype=drlseq [nlog=n]

Once created, the plex containing a log subdisk can be treated as a regular plex. Data

subdisks canbe added to the logplex. The log plex and logsubdisk can be removedusing

the same procedures as are used to remove ordinary plexes and subdisks.

Removing a DRL Log

To remove a DRL log, use the vxassist command as follows:

# vxassist remove log volume [nlog=n]

Use the optional attribute nlog=n to specify the number, n, of logs to be removed. By

default, the vxassist command removes one log.

Adding a RAID-5 Log

Note You may need an additional license to use this feature.

Only one RAID-5 plex can exist per RAID-5 volume. Any additional plexes become

RAID-5 log plexes, which are used to log information about data and parity being written

to the volume. When a RAID-5 volume is created using the vxassist command, a log

plex is created for that volume by default.

To add a RAID-5 log to an existing volume, use the following command:

# vxassist [-b] addlog volume [loglen=length]

Note If speciﬁed, the -b option makes adding the new log a background task.

Note You can specify the loglength used whenadding the ﬁrstlog to a volume. Any logs

that you add subsequently are conﬁgured with the same length as the existing log.

For example, to create a log for the RAID-5 volume volraid, use the following

command:

# vxassist addlog volraid